🔪 Slicing Strings in Python

Slicing means extracting parts of a string using indexes.

🧠 Syntax:

string[start:stop:step]

Part	Meaning
start	Index to begin the slice (inclusive)
stop	Index to end the slice (exclusive)
step	How many characters to skip (default: 1)

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🧪 Example:

text = "Python"

print(text[0:2])    # 'Py' → from index 0 up to (but not including) 2
print(text[2:])     # 'thon' → from index 2 to the end
print(text[:3])     # 'Pyt' → from start to index 3
print(text[::2])    # 'Pto' → every 2nd character
print(text[::-1])   # 'nohtyP' → reversed string

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🔗 Joining Strings in Python

Joining means combining a list (or any iterable) of strings into one string.

🧠 Syntax:

'separator'.join(iterable)

• 'separator' is what you want between each piece (like a space, comma, dash, etc.)
• iterable is usually a list of strings

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🧪 Example:

words = ["Python", "is", "fun"]

sentence = " ".join(words)
print(sentence)  # 'Python is fun'

csv_line = ",".join(words)
print(csv_line)  # 'Python,is,fun'

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🔁 Slicing + Joining Example

word = "developer"

# Slice out every other letter
sliced = word[::2]  # 'deelpr'

# Join with dashes
joined = "-".join(sliced)
print(joined)  # 'd-e-e-l-p-r'

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🧠 Summary Table

Operation	Syntax Example	Result
Slice	word[1:4]	characters from 1 to 3
Reverse	word[::-1]	reverses the string
Join (space)	" ".join(["a", "b"])	'a b'
Join (dash)	"-".join(["a", "b"])	'a-b'

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